I had the same idea. Unfortunately strace is built with android libs, so it doesn't work. I even changed it to statically linked, no go. Same binaries work on all manner of kernels I have. .27, .35. no .39.
On Fri, May 13, 2011 at 12:26 PM, Tim Bird <tim.b...@am.sony.com> wrote: > On 05/13/2011 06:16 AM, hedwin wrote: > > Well, zygoto does start but after some time it just exits, and after 4 > > times the service manager will reboot the system. > > > > There is no info in logcat or dmesg that provides any feedback about why > > zygoto did exit. > > > > Don't think that init.rc is the problem, booting the same android system > > with 2.6.32 is just fine. > > For startup problems, make sure to set "loglevel 7" > in /init.rc > > And a really good way to delve into the system is with strace. > > This should be particularly useful for this problem, since > it appears it's some interaction between the user-space > and the kernel, which is exactly what strace instruments. > (well... minus the page faults) > > Use it with both 2.6.32 and whatever kernel is failing, > and compare the results > > To use strace to trace zygote, just use it as a wrapper > in /init.rc. > > Change: > service zygote /system/bin/app_process -Xzygote /system/bin --zygote > --start-system-server > > to > > service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace > /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server > > /cache/debug/boot.strace is a writable place on my hardware > with lots of space - you can use any output path you want. > > Then adb pull the boot.strace file to the host, and start comparing. > > I hope this helps. > -- Tim > > ============================= > Tim Bird > Architecture Group Chair, CE Workgroup of the Linux Foundation > Senior Staff Engineer, Sony Network Entertainment > ============================= > > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel > -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
